bgrewriteaof.diff for redis-py

index 1c0e8fa..23b0d4a 100644
--- a/redis/client.py
+++ b/redis/client.py
@@ -213,6 +213,7 @@ class Redis(threading.local):
         string_keys_to_dict('ZRANGE ZRANGEBYSCORE ZREVRANGE', zset_score_pairs),
         {   
             'BGSAVE': lambda r: r == 'Background saving started',
+            'BGREWRITEAOF': lambda r: r == 'Background rewriting of AOF file started',
             'HGETALL': lambda r: r and pairs_to_dict(r) or None,
             'INFO': parse_info,
             'LASTSAVE': timestamp_to_datetime,
@@ -419,6 +420,12 @@ class Redis(threading.local):
         """
         return self.execute_command('BGSAVE')

+    def bgrewriteaof(self):
+        """
+        Tell the Redis server to rewrite the AOF file from data in memory.
+        """
+        return self.execute_command('BGREWRITEAOF')
+
     def dbsize(self):
         "Returns the number of keys in the current database"
         return self.execute_command('DBSIZE')